... Real factory Portable Mini USB2.0 PC Speaker System/mini stereo/laptop , subwoofer speaker ,vibration speakers systemSpecificationsIt is well ... suitable for Laptop, PC, MP4, MP3, PDA, ... Type: Wired, USB 5-6V Power supplySuitable for Laptop, PC, MP4, MP3, PDA, Home Theater, subwoofer speaker ,Portable Audio Player ...